Demountable-rim construction.



E. A. BAKER. DEMOUNTABLE RIM CONSTRUCTION. APPLIOATION PILBlj APR. 21, 1908.

98,666, Patented July 25, 1911.

2 SHEETS-SHEET 1.

Fig. i

E. A. BAKER. DBMOUNTABLE RIM CONSTRUCTION.

APPLICATION FILED APR. 21, 1908.

swzwwa ullYZ, 11911.

EDWIN A. BAKER, OF NEW YORK, N. Y., ASSIGNOR TO RAPID REMOVABLE RIM COMPANY, A COR1 ORATION OF NEW YORK.

DEMOlIN'lABLE-RIM CONSTRUCTION.

nuance.

Speciilgation of Letters Patent.

Application filed April 21, 1908.

Serial No. 428,383.

To all whom 'it may concern:

Be it known that I, EDWIN A. BAKER, a citizen of the United States, residing at New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Demountable-Rim Constructions, of which the following is a specification.

My invent-ion relates to improvements in vehicle wheeLtires and particularl to a construction in which a pneumatic tire and rim may be quickly mounted and demounted or removed from the wheel proper.

The main object'of my invention is to provide a subs antial and reliable means for securing the tire andtire-rim to the wheel in suchamanner that they will be securely held in place but may be readily removed when desired.

Another object is to accurately seat or center the tire-rim on the wheel and compensate for any inaccuracy in the construe tion of the tire-rim or the wheel,- such as slight buckling of the rim or warping as sometimes occur. In such constructions the tire and rim are subject to enormous strains, sometimes at right angles to the plane of the wheel such as when the wheel comes into forciblelateral contact, for instance with curb stones and car tracks. In some removable or detachable rim constructions, it has been proposed to provide laterally protruding devices for securing the parts together.

Such devices are likely to be injured by striking against curbstones, etc, as above mentioned.

()ne of my objects therefore, is to avoid such difficulties. This 1 have accomplished by utilizing a radially operable device for securing the tire-rim in place; On accountot the impossibility of having the parts lit accurately and remain in perfect condition when in operation, the attaching device musthave a considerable range of adjustment so that the tire-rim will. be properly seated even though considerably distorted. This I have :wcomplished by providing a series of blocks secured to the tire-rim and. adapted to lit the periphery of the wheel-rim. in conjunction with these blocks the lockur; de vices coi' )erate. llach locking device consists of a radially adjustable bolt-like member havinga. tapered end \vhiclris adapted to engage in a laperml recess in the underside of one. of the blocks attaclual to the tirerim. lVhen the tire and rim are placed in position. the locking or attaching devices are then brought into operation and the tapered ends of the bolts being forced into the recesscs in the blocks, the tire-rini is drawn into position and all lateral, circumferential and radial play is taken up. The rim is thus held rigidly to the wheel at a plurality of points about the periphery. I also provide a special device for locking the bolts in position and preventing their accidental disengagement.

Inutilizing the invention and adapting it to diflerent conditions of use, such as for light wheels, racing wheels and other special uses, somewhat different types have been developed. Some of these are illustrated in the accompanying sheets of drawings and details thereof which are more or less importantwill be found more fully described hereinafter. i .l igure 1. is a vertical projecton of a wheel of. one form embodying improvements of my invention. Fig. 2. is a cross-sectional view of the same at one of the locking de vices. Fig. 3. is a side view of a fragment of the tire and rim and projecting valve stem. Fig. 4-. is a plan view of a fragment of the wheel-rim adapted to receive the tirerim and valve stem abm'e. Fig. 5. is a side view similar to Fig. 1. of a somewhat different type of construction embodying my invention. .l ig. (3. is a cross-sectional view of the tire and rim of the same showing a locking device. Fig. 7, is a detailed view of a special device for preventing accidental movement of the locking device in Fig. 6. Pig. 8 is a detail plan, view of one of the platforms or spacing devices of the wheel of Fig. 5. showing a tapered. block receiving recess and bolt passage. Fig. 9. is a plan view of one of the tapered blocks secured to the tire-rim and adapted to he SlliQCl in the tapered. recess shown in Fig. 8, a fragment of the lire-rim being shown dotted. Fig. 10. a. side view and partial section of another type of construction embodying my invention. Fig. 11. is an end View of the platform or spacing device of the construction shown in Fig. 10,

'llmlype of construction shown in Fig.1 is particularly adapted to such pneumatic Patented July 25, 16, 11.

tires as employ what is known short or 55 -on to the wheel-rim the blocks 1), i) are only a very short, distance. Such construeand secured in any suitable manner to the tire-rim 4. The flange 2 serves as a lateral abutment on one side. A plurality of lock ing devices are provided, for instance four as shown in Fig. 1, each one being designated by the numeral 5. The construction of the rim locks is shown more fully in Fig. 2. The sleeve 6 is secured to the wheel-rim in a suitable manner, for instance by being screwed into the stceln im 2. The shank of the rim lock 5 is screw-threaded and adjustable in a thread in the sleeve 6, so that it may be moved radially. The inner end of loci; 5 may be suitably formed, for instance for the engagement of a wrench. The outer end 7 of the rim lockis enlarged and is guided in. a correspondingly shaped recess in the sleeve 6. .The tip 8 of the rim lock is tapered as shown, so as to more readily engage ina correspondingly shaped recess in the block 9, which is secured in a suitable manner to thetire-rim 4. These blocks 9 afford substantial seats for the rim locks and also space the tire-rim away from the wheel-rim sothat the bearing surface be tween the rims is of much less area than the periphery of the tire-rim. This reduces the friction and danger of adhesion bycorrosion to a minimum, so that the tire rim -may always be more readily mounted and demounted. At the point of the wheel-rim 2 where the valve-stem 10 comes, I provide a block 11 as shown in Fig. 4: affording a raised platform for the support of the tirerim and having a perforation. 12 to receive the valve stem. 'The tire-rim being assumed,

'niounted .as shown in Fig. 1, it is prepared for demounting by releasing or retracting the four rim locks 5, 5, 5, 5. part of the tire-rim 1s then swung outwardly so as to be clear :of the wheel-rim. The tire-rim can then be lifted and the 'alvcstcm withdrawn from the recess 12. The

..- mounting of the tire-rim is accomplished inthe-rcverse manner-and the insertion ot the valve-stem 10 in the recess 12 serves to position the tire so that when it' is swung .-:brought into proper position for engage 'ment' of the run locks. lnordcr to prevent the rim locks from working loose, I prefer to providc a special check nut or device as shown in Figs. 2, (3, 7 and 10; \Ving nut threaded intcriorly and turnson the shank of the I'lIII-lOCli-5. Integral with the co-a'ct with the walls of an eccentric recess and cause dilliculty in demounting;

pcrcd recess 23 accounutalatcs the block 9' 110 The lower.

gives great strength and is also more 15 in theslecve 6 (see Fig. 2). In Figs. 6 and 7, therpccss 15 is in a sleeve 16 which is secured in place, for instance by a screw or screws 17. hen the wing nut is turned so as to jam the cam 14: against the wall partial revolution so as to disengage the cum from the recess wall. The rim-lock may then be screwed in either direction. For the purposes of assembling or repairing, .the rim lock may be removed outwardly from the sleeve (3 (see Fig. 2), after the tire-rim 0 is demounted, by the use of a screw driver in the slot as shown in the tip 8.

The type of construction shown in Figs. 5 and 6 is particularly adapted for such tires with what is known as long lugs 18,

18, etc. These lugspraject radially inward and are generally employed for attaching pneumatic clcncher tires to their rims. In the construction shown. in these figures, a

series of spacing members, such as 19, 1

are mounted on the steel wheel rim, 2. These provide raised platforms on which the tire-rim 4 is mounted.v Between the platforms recesses are formed, such as 20,

which are laterally open for the purpose of receiving the lugs 18,18. Each of these spacing members 13) carries one of the sleeves (3 with a; rim lock 5 as before described, and the tire-rim carries a series of blocks, such as 9 for receiving the tip 8 of the correspending rim lock. This block is preferably tapered as shown in Fig. 9. The periphery of' each spacing member 19 is provided with a plate. 21 which forms the platform or bearing surfacc'for the tire-rim. To reducc'the bearing surface of the plate it may be grooved as at 22, so that there may be less tendency for the tircrim to bind A taso that lll'lllOlllll'lllQ thc'rim the blocks circiuuferent-ially adjust themselves. In order to limit the ,uiovcmcnt of the tire-rim in mounting, the shoulder 24 is preferably provided on one side of each of the platform plates 21. To cover the lateral entrance to the recess 2 a plate 25 is provided. In the form shown in Fig. 5 a laterally open recess 26 is provided for the valve stem 10,

so that the tire and its rim may be mounted and dcmouuted by straight lateral movement as distinguished from theswinging and vertical movement described lil regard to the construction of Fig. l.

The construction of Figs. 1 and 11 is similar to that of Figs. 5 and (5 except that the spacing members 27 are"formed from cored castings as distinguished from the solid blocks. This construction is light and less attractive in appearance. In Fig. 10 the rim lock 5 is shown retracted.

What I claim is:

1. A vehicle wheel construction compris. mg, a tlre run, a wheel run, a series of sleeve members carried thereby having interiorly threaded portions, radially movable locking bolts in said sleeve members and a sries oi clamping members on said. bolts, the members of one of said series of members having recesses eccentric to the bolts and the members of the other series of members having cams coactin therewith for preventing the rotation of the bolts. I

2. A vehicle Wheel construction comprising a Wheel-rim, a tire-rim, a sleeve carried by said Wheel-rim and having a threaded passage and a recess at the mouth of the passage with a Wall eccentric to said passage, a threaded locking bolt rotatable and radially operable in said passage for centering and securing said t re run on said wheel having a cam on one end adapted to engage the wall in said recess to clamp said locking bolt and prevent its rotation. V

- 3. A vehicle wheel construction comprising a wheel rim, a series 0% bearing mem bers secured thereto having radial screwthreaded passages and GflIIYWflllS at the inner ends of said passages eccentric to the pets.

EDWIN A. BAKER.

Witnesses:

EDWARD W. HILL, RoB'r. S. 'ALLYN.

rim and a nut operable on said bolt and 

